Brake-shoe.



G. W. ARMBRUST.

BRAKE SHOE.

APPLICATION FILED MAY 27,1911.

1,014,933,, Patented Jan.16,1912.

STATES PATENT OFFICE.

W." A RMBRUS'I, OF CRYSTAL LAKE, ILLINOIS, ASSIG-NOR OF ONE-FOURTH TO SYDNEY STEIN, OF CHICAGO, ILLINOIS.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Jan. 16, 1912.

OriginalQapplication .iiled December 22, 1910, Serial No. 598,700. Divided and this application filedMay 27,

Serial No. 629,880.

To all whomit-mayconcem! Be it known that-.1, CHARLES W. ARM- BRUST, a citizen of the United States, residing at. Crystal Lake, in the county of Mc- Henry andState of Illinois, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

This invention relates to brake-shoes having reference mainly, although not exclusively, to shoes of the type known as in terlocking shoes wherein the back and face of the shoe are. provided with interlocking means whereby a partially worn shoe can be detached from the head and applied to the wearing face of anew shoe so that the partially worn'shoe is completely .used up.

My present invention,-which constitutes a division of an application heretofore filed by me on the 22d day of December, 1910, Serial No. 598,700, relates mainly to the feature of a detachable central fastening lug through which passes the usual locking-pin or key, by the use of which the thickness of the shoe may be somewhat reduced and its strength or power of resistance to transverse breaking strains increased.

My invention and its manner of use will be readily understood when considered in connection with the accompanying drawings showing preferred forms thereof, in which Figure 1 is a side elevation, partly in section, of a shoe employing one form of detachable malleable central fastening lug. Fig. 2 is a view similar to Fig. 1, but showing another form ofdetachable central lug adapted to fit a recess or socket in the spac ing lug or plate and the back of the shoe. Fig. 3 is a cross-section on the line 3-3 of Fig. 1. Fig. 4is an end elevation partly in broken section of the structure shown in Fig. 2. Fig. 5-is a detail fragmentary top Fig. 1.

and integral with the end portions of the;

ends. The recesses 15 are open onone side B0 of the shoe but preferably closed on the opposite side by the opposite wall of the shoe to prevent separation of the two shoes 'on that side through which the open ends of the recesses 15 are formed, the latter side of the shoe being that designed to lie adjacent to the flange of the car wheel.

Referring to Figs. 1, 3, and 6, 19 designates a short transversely dovetailed integral lug formed on the back of the spacinglug 11, and 20 designates a correspondingly shaped transverse'recess or socket formed centrally of theface of the shoe-body. Cooperating with the' lug 19 is a malleable locking-lug 21 having a key-way 22 formed therethrough, and,in its base, a dovetailed transverse slot 23 adaptedto have a sliding and interlocking-fit with the lug 19, as

clearly shown in Figs. 1 and 3.

In the modified form of the invention shown in Figs. 2, 4, and 5, the central locking-lug 24 is provided with the usual keyway 25' and has a tapered or outwardly flared base 26 that engages an undercut socket 27 formed in the spacing-lug 11 and shoe-body 10. To provide for the insertion of the lug 24 in the socket 27, one end of the latter communicates with a shallow socket or entrance-way 28 formed opposite one end of the main socket 27, the entrance-way 28 the latter reside in the fact that when a partially worn shoe is to be applied to a new shoe, this central fastening lug can-be removed, consequently making it unnecessary to socket the central. part of the face of the shoe at all or more than enough to accommodate the shortlug 19, thus permitting the use of .a thinner shoe'and theattainment of greater transverse strength in.

the shoe.

It will be evident to those skilled in the art that slightchanges and variations in the forms and dimensions of the parts herein shown and described can be made Without' involving any difi'erence in principle of operation or the manner of action and manipulation. Hence, I. regard such minor changes and variations as within the scope of the invention as defined in the appended claims.

I claim:

r 1. A-brake-shoe com rising a body-'m'ember, an independently ormed fastening lug, and means for detachably keying the latter on the back of said bodyember, substantially as described.

2. 'A brake-shoe comprising a body-memher and a detachable fastening lug therefor, said body-member and fastening lug being provided with interfitting parts whereby said fastening lug may be secured to and removed from said body-member by a relative sliding movement therebetween, substantially as described.

3. A brake-shoe comprising a body-mem her and a detachable fastening lug therefor,

CHARLES W. ARMBRUST.

Witnesses SAMUEL N. Pom), CHARLES J. SCHMIDT. 

